JP2009543539A - Circuit operating current balancing device and method for battery device - Google Patents
Circuit operating current balancing device and method for battery device Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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Abstract
本発明は、バッテリー装置を構成する各ユニットの回路動作電流のバランシングを行うバッテリー装置の回路動作電流バランシング装置及び方法を提供することをその目的とする。上述した本発明によれば、一つ以上のセルから構成されるセルスタックが多数備えられたバッテリー装置において、上記多数のセルスタックそれぞれに連結された上記セルスタックの状態の制御またはモニタリングを行う回路である制御回路の回路動作電流をバランシングする装置であって、対応するセルスタックの出力電圧と対応するセルスタックに連結された上記制御回路の電圧との間の電圧差を演算し出力する比較部；及び上記比較部の出力に対応して上記制御回路の回路動作電流にダミー電流を加減する電流源；を含むことを特徴とする。 An object of the present invention is to provide a circuit operating current balancing device and method for a battery device that performs balancing of circuit operating current of each unit constituting the battery device. According to the above-described present invention, in a battery device provided with a large number of cell stacks composed of one or more cells, a circuit for controlling or monitoring the state of the cell stack connected to each of the large number of cell stacks. Comparing unit for balancing the circuit operating current of the control circuit, which calculates and outputs the voltage difference between the output voltage of the corresponding cell stack and the voltage of the control circuit connected to the corresponding cell stack And a current source for adjusting a dummy current to the circuit operating current of the control circuit corresponding to the output of the comparison unit.
Description
本発明は、バッテリー装置に関するものであって、さらに詳しくは、上記バッテリー装置の各ユニット間回路動作電流のバランスを調節するバッテリー装置の回路動作電流バランシング装置及び方法に関する。 The present invention relates to a battery device, and more particularly to a circuit operation current balancing device and method for a battery device that adjusts the balance of circuit operation current between units of the battery device.
一般のバッテリー装置の概略的な構成を図１を参照しながら説明する。 A schematic configuration of a general battery device will be described with reference to FIG.
上記バッテリー装置は一つ以上の電池セルを直列に接続させた電池セルスタックＣ１〜ＣＮを多数備え、上記多数の電池セルスタックＣ１〜ＣＮそれぞれにはアナログ前処理回路Ａ１〜ＡＮが連結される。 The battery device includes a large number of battery cell stacks C1 to CN in which one or more battery cells are connected in series, and analog preprocessing circuits A1 to AN are connected to the battery cell stacks C1 to CN, respectively.
上記多数のアナログ前処理回路Ａ１〜ＡＮは、電圧及び電流の検出、制御、レギュレーティング機能を行い、一つのアナログ前処理回路Ａ１〜ＡＮに連結される電池セルはアプリケーションの種類に応じて可変可能である。 The large number of analog pre-processing circuits A1 to AN perform voltage and current detection, control, and regulating functions, and the battery cells connected to one analog pre-processing circuit A1 to AN can be changed according to the type of application. It is.
上記アナログ前処理回路Ａ１〜ＡＮには、各電池セルスタックＣ１〜ＣＮを制御する制御部Ｍ１〜ＭＮが連結される。 Control units M1 to MN for controlling the battery cell stacks C1 to CN are connected to the analog preprocessing circuits A1 to AN.
上述したアナログ前処理部Ａ１〜ＡＮは、上記各電池セルスタックＣ１〜ＣＮの電圧及び電流を検出して対応する制御部Ｍ１〜ＭＮに提供し、各制御部Ｍ１〜ＭＮは上記検出結果に応じて各電池セルの過電圧、過電流、過放電などの状態を認知し、スイッチング素子ＣＦＥＴ，ＤＦＥＴのオン／オフを制御することで、バッテリー装置を保護する。 The analog preprocessing units A1 to AN described above detect the voltages and currents of the battery cell stacks C1 to CN and provide them to the corresponding control units M1 to MN. The control units M1 to MN respond to the detection results. Thus, the battery device is protected by recognizing the state of each battery cell such as overvoltage, overcurrent, and overdischarge and controlling the on / off of the switching elements CFET and DFET.
上述したバッテリー装置において、一つの電池セルスタックと、当該電池セルスタックに連結された一つのアナログ前処理回路、当該アナログ前処理回路に連結された一つの制御部を一つのユニットと称する。 In the battery device described above, one battery cell stack, one analog preprocessing circuit connected to the battery cell stack, and one control unit connected to the analog preprocessing circuit are referred to as one unit.
上記バッテリー装置に備えられる多数のユニットのうち何れか一つのユニットに流れる回路動作電流をＩｃｃとするとき、接地（ＧＮＤ）を基準としてＮ番目ユニットの回路動作電流をＩｃｃｎと称することができる。 When the circuit operating current flowing through any one of the many units included in the battery device is Icc, the circuit operating current of the Nth unit can be referred to as Iccn with reference to the ground (GND).
上記バッテリー装置の外部負荷に流れる電流は、ＣＦＥＴ→ＤＦＥＴ→第ＮセルスタックＣＮ→…→第１セルスタック→電流検出抵抗（Ｒｓｈｕｎｔ）の経路で流れ、充電または放電などによって電流方向は反対になり得る。 The current flowing to the external load of the battery device flows through the path of CFET → DFET → Nth cell stack CN →... → first cell stack → current detection resistor (Rshunt), and the current direction is reversed by charging or discharging. obtain.
上記バッテリー装置において、上記第１ないし第Ｎユニットの回路動作電流Ｉｃｃ１，Ｉｃｃ２，…，Ｉｃｃｎ は、電池セル電圧の不均衡（ｕｎｅｖｅｎｎｅｓｓ）または電圧及び電流検出回路における電流の不均衡、温度特性による電圧及び電流検出回路の動作電流における不均衡などのため、常に一定には維持されない。 In the battery device, the circuit operating currents Icc1, Icc2,..., Iccn of the first to Nth units are battery cell voltage unbalance or voltage / current detection circuit current imbalance, voltage due to temperature characteristics. And because of an imbalance in the operating current of the current detection circuit, it is not always kept constant.
これを数式で表せば、下記式（１）のとおりである。 This can be expressed by the following formula (1).
Ｉｃｃ１≠Ｉｃｃ２≠Ｉｃｃｎ （１）
このように第１ないし第Ｎユニットの回路動作電流は同一ではなく、このような回路動作電流の不均衡はセルスタックの放電電流に影響を及ぼして各ユニット間放電電流の不均衡を引き起こす。これは、上記回路動作電流が上記電池セルスタックの放電電流に加えられるからである。
Icc1 ≠ Icc2 ≠ Iccn (1)
As described above, the circuit operating currents of the first to Nth units are not the same, and the imbalance of the circuit operating currents affects the discharge current of the cell stack, causing the imbalance of the discharge currents between the units. This is because the circuit operating current is added to the discharge current of the battery cell stack.
このような状態が長期間維持されれば、時間の経過とともに各ユニット間残存容量に不均衡が引き起こされる。 If such a state is maintained for a long period of time, an imbalance is caused in the remaining capacity between units as time passes.
例えば、第１電池セルスタックＣ１の残存容量が５０％、第２電池セルスタックＣ２の残存容量が３０％、第Ｎ電池セルスタックＣＮの残存容量が４０％であると仮定する。 For example, it is assumed that the remaining capacity of the first battery cell stack C1 is 50%, the remaining capacity of the second battery cell stack C2 is 30%, and the remaining capacity of the Nth battery cell stack CN is 40%.
このように各電池セルスタックの残存容量に不均衡が生じた状態でバッテリーパックを充電すれば、残存容量が最も大きい電池セルスタックである第１電池セルスタックＣ１が満充電になるときにバッテリー装置全体の充電が完了したと判断され、充電開始時の残存容量の不均衡がそのまま維持される。 If the battery pack is charged in such a state where the remaining capacity of each battery cell stack is unbalanced, the battery device when the first battery cell stack C1, which is the battery cell stack having the largest remaining capacity, is fully charged. It is determined that the entire charging has been completed, and the remaining capacity imbalance at the start of charging is maintained as it is.
このような状態で充電が終了すれば、第２電池セルスタックＣ２の残存容量は８０％、第Ｎ電池セルスタックＣＮの残存容量は９０％になるので、完全な満充電は不可能になってしまう。 If charging is completed in such a state, the remaining capacity of the second battery cell stack C2 is 80%, and the remaining capacity of the Nth battery cell stack CN is 90%. End up.
また、各ユニット間の回路動作電流の不均衡、すなわち回路による放電電流の不均衡は、長期保存時に各ユニットが同時に過放電領域に入らずに、あるユニットは過放電領域に早めに入っていき、あるユニットは遅めに入っていくことにして、電池セルの劣化にも不均衡が発生する原因になった。 In addition, an imbalance in circuit operating current between units, that is, an imbalance in discharge current due to circuits, is that each unit does not enter the overdischarge region at the same time during long-term storage, and a unit enters the overdischarge region early. Some units moved in late, causing the battery cells to become unbalanced.
よって、従来バッテリー装置においては、各ユニットの回路動作電流のバランシングを行う技術の開発が切実に要望された。 Therefore, in the conventional battery device, development of a technique for balancing the circuit operating current of each unit has been urgently required.
本発明は、上述した従来の問題点を克服するためのものであって、バッテリー装置を構成する各ユニットの回路動作電流のバランシングを行うバッテリー装置の回路動作電流バランシング装置及び方法を提供することを目的とする。 The present invention is intended to overcome the above-described conventional problems, and provides a circuit operating current balancing device and method for a battery device that balances circuit operating current of each unit constituting the battery device. Objective.
上記の目的を達成し従来技術の問題点を解決するための本発明によるバッテリー装置の回路動作電流バランシング装置は、一つ以上のセルから構成されるセルスタックが多数備えられたバッテリー装置において、上記多数のセルスタックそれぞれに連結された上記セルスタックの状態の制御またはモニタリングを行う回路である制御回路の回路動作電流をバランシングする装置であって、対応するセルスタックの出力電圧と対応するセルスタックに連結された上記制御回路の電圧との間の電圧差を演算し出力する比較部；及び上記比較部の出力に対応して上記制御回路の回路動作電流にダミー電流を加減する電流源；を含む。 The circuit operation current balancing device of the battery device according to the present invention for achieving the above object and solving the problems of the prior art is a battery device provided with a number of cell stacks composed of one or more cells. A device for balancing the circuit operating current of a control circuit, which is a circuit for controlling or monitoring the state of the cell stack connected to each of a large number of cell stacks, the output voltage of the corresponding cell stack and the corresponding cell stack A comparator for calculating and outputting a voltage difference from the voltage of the connected control circuit; and a current source for adding or subtracting a dummy current to the circuit operating current of the control circuit corresponding to the output of the comparator. .
本発明の他の態様によるバッテリー装置の回路動作電流バランシング方法は、一つ以上のセルから構成されるセルスタックが多数備えられたバッテリー装置において、上記多数のセルスタックそれぞれに連結された上記セルスタックの状態の制御またはモニタリングを行う回路である制御回路の回路動作電流をバランシングする方法であって、対応するセルスタックの出力電圧と対応するセルスタックに連結された上記制御回路の電圧との間の電圧差を演算し出力する段階；及び上記出力に対応して上記制御回路の回路動作電流にダミー電流を加減する段階；を含む。 According to another aspect of the present invention, there is provided a battery device circuit operation current balancing method, wherein the cell stack is connected to each of the plurality of cell stacks in a battery device including a plurality of cell stacks including one or more cells. A method for balancing circuit operating current of a control circuit, which is a circuit that controls or monitors the state of the current, between an output voltage of a corresponding cell stack and a voltage of the control circuit connected to the corresponding cell stack Calculating and outputting a voltage difference; and adding or subtracting a dummy current to a circuit operating current of the control circuit corresponding to the output.
上述した本発明によるバッテリー装置の回路動作電流バランシング装置の構成について、図２を参照しながら説明する。ここで、従来バッテリー装置の構成と同一の部分に対しては説明を省略する。 The configuration of the above-described circuit operating current balancing device of the battery device according to the present invention will be described with reference to FIG. Here, the description of the same parts as those of the conventional battery device is omitted.
上記バッテリー装置に備えられる多数の電池セルは、一つ以上がグループ化された第１ないし第Ｎ電池セルスタックＣＥ１〜ＣＥＮから構成される。上記第１ないし第Ｎ電池セルスタックＣＥ１〜ＣＥＮにはそれぞれ、第１ないし第Ｎアナログ前処理回路Ａ１〜ＡＮが連結される。 A number of battery cells included in the battery device includes first to Nth battery cell stacks CE1 to CEN, one or more of which are grouped. First to Nth analog pre-processing circuits A1 to AN are connected to the first to Nth battery cell stacks CE1 to CEN, respectively.
上記アナログ前処理回路は上述したように、電流の検出、制御、レギュレーティング機能を行い、上記一つのアナログ前処理回路Ａ１〜ＡＮに連結される電池セルはアプリケーションの種類に応じて可変可能な回路であって、多数のセルスタックそれぞれに連結された上記セルスタックの状態の制御またはモニタリングを行う回路を意味する。 As described above, the analog preprocessing circuit performs current detection, control, and regulation functions, and the battery cell connected to the one analog preprocessing circuit A1 to AN is a circuit that can be changed according to the type of application. In this case, it means a circuit for controlling or monitoring the state of the cell stack connected to each of a large number of cell stacks.
本発明を説明するに際して上記制御回路とは、上記アナログ前処理回路を含む概念であって、セルスタックの電流、電圧、抵抗または電力などの状態に対するモニタリングだけでなく上記セルスタックの制御などを担当する回路を意味し、特に言及しなければ上記アナログ前処理回路は、本発明の説明において上記制御回路の一実施形態を意味すると解釈されるべきである。 In describing the present invention, the control circuit is a concept including the analog pre-processing circuit, and is responsible not only for monitoring the state of the cell stack such as current, voltage, resistance or power but also for controlling the cell stack. Unless otherwise stated, the analog preprocessing circuit should be taken to mean one embodiment of the control circuit in the description of the invention.
上記第１ないし第Ｎアナログ前処理回路Ａ１〜ＡＮそれぞれには、本発明の望ましい実施例に従って回路動作電流バランシング装置が含まれる。上記回路動作電流バランシング装置は、比較器Ｓ１〜ＳＮ及び電流源Ｐ１〜ＰＮから構成される。 Each of the first to Nth analog preprocessing circuits A1 to AN includes a circuit operating current balancing device according to a preferred embodiment of the present invention. The circuit operating current balancing device includes comparators S1 to SN and current sources P1 to PN.
上記比較器Ｓ１〜ＳＮそれぞれは、対応する電池セルスタックの電圧出力端子と連結され、電池セルスタックの電圧出力端子のうち何れか一方の端子の電圧と自分が属するアナログ前処理回路の接地端子の電圧とを比較した結果、及び電池セルスタックの電圧出力端子のうち他方の端子の電圧と自分が属するアナログ前処理回路の電圧端子の電圧とを比較した結果を利用し、その比較結果に対応するダミー電流を生成するための制御電圧を出力する。 Each of the comparators S1 to SN is connected to a voltage output terminal of the corresponding battery cell stack, and the voltage of any one of the voltage output terminals of the battery cell stack and the ground terminal of the analog preprocessing circuit to which it belongs. Using the result of comparing the voltage and the result of comparing the voltage of the other voltage output terminal of the battery cell stack with the voltage of the voltage terminal of the analog preprocessing circuit to which it belongs, and corresponding to the comparison result A control voltage for generating a dummy current is output.
上記電流源Ｐ１〜ＰＮそれぞれは、上記比較器Ｓ１〜ＳＮが出力する制御電圧に対応するダミー電流を回路動作電流に加減する。 Each of the current sources P1 to PN adds or subtracts a dummy current corresponding to the control voltage output from the comparators S1 to SN to the circuit operating current.
すなわち、上記電流源Ｐ１〜ＰＮそれぞれは下記式（２）のように、各ユニットの回路動作電流Ｉｃｃ１，Ｉｃｃ２，…，Ｉｃｃｎに、ダミー電流Ｉｄｕｍｍｙ１，Ｉｄｕｍｍｙ２，…，Ｉｄｕｍｍｙｎを加えて流し、各ユニットごとの回路動作電流が同一になるようにする。 That is, each of the current sources P1 to PN flows the circuit operation currents Icc1, Icc2,..., Iccn of each unit by adding the dummy currents Idummy1, Idummy2,. Each circuit operating current is made the same.
Ｉｄｕｍｍｙ１＋Ｉｃｃ１＝Ｉｄｕｍｍｙ２＋Ｉｃｃ２＝Ｉｄｕｍｍｙｎ＋Ｉｃｃｎ＝Ｉｃｃｔｔｌ（全電流） （２）
上述した第１ないし第Ｎアナログ前処理部Ａ１〜ＡＮに備えられる回路動作電流バランシング装置の構成及び動作は同一であるので、以下第２アナログ前処理部Ａ２に備えられる回路動作電流バランシング装置の構成のみを詳しく説明する。
Idummy1 + Icc1 = Idummy2 + Icc2 = Idummyn + Iccn = Iccctl (total current) (2)
Since the configuration and operation of the circuit operation current balancing device provided in the first to Nth analog preprocessing units A1 to AN are the same, the configuration of the circuit operation current balancing device provided in the second analog preprocessing unit A2 is described below. Only will be described in detail.
上記比較器Ｓ２は、図３に示すように、第１及び第２比較器ＣＡ１，ＣＡ２、第１及び第２加算器ＡＤ１，ＡＤ２から構成される。 As shown in FIG. 3, the comparator S2 includes first and second comparators CA1 and CA2, and first and second adders AD1 and AD2.
上記第２比較器ＣＡ２は、回路接地電圧（ＧＮＤ２）と第２電池セルスタックＣＥ２の電圧（ＧＮＤ２Ｃｅｌｌ）とを比較して、回路接地電圧（ＧＮＤ２）が大きければマイナス電圧を発生し、第２電池セルスタックＣＥ２の電圧（ＧＮＤ２Ｃｅｌｌ）が大きければプラス電圧を発生する。 The second comparator CA2 compares the circuit ground voltage (GND2) with the voltage (GND2Cell) of the second battery cell stack CE2, and generates a negative voltage if the circuit ground voltage (GND2) is large. If the voltage (GND2Cell) of the cell stack CE2 is large, a positive voltage is generated.
上記第１比較器ＣＡ１は、第２電池セルスタックＣＥ２の出力電圧（Ｖｃｓ２）と回路電圧（ＶＤＤ２）とを比較して、回路電圧（ＶＤＤ２）が大きければプラス電圧を発生し、第２電池セルスタックＣＥ２の出力電圧（Ｖｃｓ２）が大きければマイナス電圧を発生する。 The first comparator CA1 compares the output voltage (Vcs2) of the second battery cell stack CE2 with the circuit voltage (VDD2) and generates a positive voltage if the circuit voltage (VDD2) is large. If the output voltage (Vcs2) of the stack CE2 is large, a negative voltage is generated.
第１及び第２加算器ＡＤ１，ＡＤ２は、上記第１及び第２比較器ＣＡ１，ＣＡ２の出力による電圧制御型電流源Ｐ１に対する動作点を制御するためのオフセット電圧を加算して出力する。 The first and second adders AD1 and AD2 add and output an offset voltage for controlling the operating point for the voltage-controlled current source P1 based on the outputs of the first and second comparators CA1 and CA2.
上記第１及び第２加算器ＡＤ１，ＡＤ２の出力端子は互いに連結され、上記第１及び第２加算器ＡＤ１，ＡＤ２の出力が重畳され電圧制御型電流源Ｐ１の制御電圧として上記電圧制御型電流源Ｐ１に入力される。 The output terminals of the first and second adders AD1 and AD2 are connected to each other, and the outputs of the first and second adders AD1 and AD2 are overlapped with each other to control the voltage controlled current as the control voltage of the voltage controlled current source P1. Input to source P1.
上記電圧制御型電流源Ｐ１は、上記第１及び第２加算器ＡＤ１，ＡＤ２の出力を加算した制御電圧の提供を受け、上記制御電圧に対応する電流（Ｉｄｕｍｍｙ２）を出力する。上述した電圧制御型電流源Ｐ１は図４及び図５のように構成でき、上記図４及び図５に示す電圧制御型電流源Ｐ１の構成は公知された一般的な構成であるのでその詳細な説明は省略する。 The voltage-controlled current source P1 receives a control voltage obtained by adding the outputs of the first and second adders AD1 and AD2, and outputs a current (Idummy2) corresponding to the control voltage. The voltage-controlled current source P1 described above can be configured as shown in FIGS. 4 and 5, and the configuration of the voltage-controlled current source P1 shown in FIGS. Description is omitted.
上記第１及び第２加算器ＡＤ１，ＡＤ２の出力は、それぞれダイオードＤ１，Ｄ２を通して連結され、上記連結端子は抵抗Ｒを介して接地される。上記ダイオードＤ１，Ｄ２及び抵抗Ｒは上記第１及び第２加算器ＡＤ１，ＡＤ２の出力を安定化させるためのものである。 The outputs of the first and second adders AD1 and AD2 are connected through diodes D1 and D2, respectively, and the connection terminal is grounded through a resistor R. The diodes D1, D2 and the resistor R are for stabilizing the outputs of the first and second adders AD1, AD2.
また、第２電池セルスタックＣＥ２と回路接地（ＧＮＤ２）との間に連結されたキャパシタＣ２は、フィードバックループの安全性と周波数特性を制限するために挿入される。 A capacitor C2 connected between the second battery cell stack CE2 and circuit ground (GND2) is inserted to limit the safety and frequency characteristics of the feedback loop.
そして、第２電池セルスタックＣＥ２と回路接地（ＧＮＤ２）との間に連結されたダイオードＤ３は、ダミー電流を制御するとき、回路接地（ＧＮＤ２）が過度にマイナス電圧になる場合に、このマイナス電圧を制限するために挿入される。ここで、上記ダイオードＤ３はダミー電流を流す本発明の回路が正常に動作しているときには動作しない。 The diode D3 connected between the second battery cell stack CE2 and the circuit ground (GND2) has a negative voltage when the circuit ground (GND2) becomes an excessively negative voltage when controlling the dummy current. Inserted to limit. Here, the diode D3 does not operate when the circuit of the present invention through which a dummy current flows is operating normally.
また、本発明による回路動作電流バランシング装置は、ダミー電流（Ｉｄｕｍｍｙ）が僅かである場合には、第１または第２比較器ＣＡ１，ＣＡ２のうち何れか一つのみを実装するだけでも所望の機能を実現することができる。 Further, the circuit operating current balancing device according to the present invention has a desired function even when only one of the first or second comparators CA1 and CA2 is mounted when the dummy current (Idummy) is small. Can be realized.
上述した本発明の望ましい実施例による回路動作電流バランシング装置の動作について、図６を参照しながら詳しく説明する。ここで、便宜上第２電池セルスタックＣＥ２に連結されたアナログ前処理回路に備えられた回路動作電流バランシング装置の動作のみを例に挙げて説明する。 The operation of the circuit operating current balancing device according to the preferred embodiment of the present invention will be described in detail with reference to FIG. Here, only the operation of the circuit operation current balancing device provided in the analog preprocessing circuit connected to the second battery cell stack CE2 will be described as an example for convenience.
まず、第２電池セルスタックＣＥ２の接続点の電圧（Ｖｃｓ２）と電圧（ＧＮＤ２Ｃｅｌｌ）が変化しなかったときを仮定して説明する。 First, description will be made assuming that the voltage (Vcs2) and the voltage (GND2Cell) at the connection point of the second battery cell stack CE2 have not changed.
回路の初期状態として、Ｉｄｕｍｍｙ１＋Ｉｃｃ１＝Ｉｄｕｍｍｙ２＋Ｉｃｃ２＝Ｉｄｕｍｍｙｎ＋Ｉｃｃｎ＝Ｉｃｃｔｔｌであると仮定すれば、この場合Ｖｃｓ２とＶＤＤ２とは同一であり、ＧＮＤ２ＣｅｌｌとＧＮＤ２とも同一である。 Assuming that the initial state of the circuit is Idummy1 + Icc1 = Idummy2 + Icc2 = Idummyn + Iccn = Iccctl, in this case, Vcs2 and VDD2 are the same, and GND2Cell and GND2 are also the same.
ここで、第１ないし第３抵抗（Ｒｃｉｒｃｕｉｔ１，Ｒｃｉｒｃｕｉｔ２，Ｒｃｉｒｃｕｉｔ３）は、各ユニットのアナログ前処理回路の抵抗成分を示す。ここで、上記抵抗のうち第２抵抗（Ｒｃｉｒｃｕｉｔ２）のみが動作状態によって＋または−ΔＲｃｉｒｃｕｉｔ２だけ変化したと仮定し、残りの第１及び第３抵抗（Ｒｃｉｒｃｕｉｔ１，Ｒｃｉｒｃｕｉｔ３）は変化しない固定値であると仮定する。
Here, the first to third resistors (Rcircuit1, Rcircuit2, Rcircuit3) indicate resistance components of the analog preprocessing circuit of each unit. Here, it is assumed that only the second resistance (Rcircuit 2) of the above resistances has changed by + or −
このような状態で、第２抵抗（Ｒｃｉｒｃｕｉｔ２）が＋ΔＲｃｉｒｃｕｉｔ２だけ変化してＩｃｃ２が減少すれば、ＶＤＤ２電圧は＋ΔＶＤＤ２だけ変化し、ＧＮＤ２電圧は−ΔＧＮＤ２だけ変化できる。 In this state, if the second resistance (Rcircuit2) changes by + ΔRcircuit2 and Icc2 decreases, the VDD2 voltage changes by + ΔVDD2, and the GND2 voltage can change by -ΔGND2.
このとき、第２セルスタックＣＥ２の電圧（Ｖｃｓ２）及び接地電圧（ＧＮＤ２Ｃｅｌｌ）は固定されているので、第１及び第２比較器ＣＡ１，ＣＡ２は＋ｅｒｒｏｒ出力を発生する。 At this time, since the voltage (Vcs2) and the ground voltage (GND2Cell) of the second cell stack CE2 are fixed, the first and second comparators CA1 and CA2 generate + error output.
加算器ＡＤは、動作点を調整するためにオフセット電圧と上記第１及び第２比較器ＣＡ１，ＣＡ２の出力を加算して出力する。ここで、上記加算器ＡＤは図３の例のように、第１及び第２比較器ＣＡ１，ＣＡ２の出力それぞれに対してオフセット電圧を加算し、その結果を再び加算する方法を用いるか、上記オフセット電圧と第１及び第２比較器ＣＡ１，ＣＡ２の出力を加算する方法を用いることができる。 The adder AD adds and outputs the offset voltage and the outputs of the first and second comparators CA1 and CA2 in order to adjust the operating point. Here, the adder AD uses a method of adding an offset voltage to each of the outputs of the first and second comparators CA1 and CA2 and adding the results again, as in the example of FIG. A method of adding the offset voltage and the outputs of the first and second comparators CA1 and CA2 can be used.
上記加算器ＡＤから出力された制御電圧は、バッファーＢを通じて電圧制御型電流源Ｐ１に提供される。上記電圧制御型電流源Ｐ１は、加算器ＡＤの出力電圧が＋であればＩｄｕｍｍｙ２は増加してＶＤＤ２電圧が−（マイナス）方向に変化（低下）し、ＧＮＤ２電圧が＋（プラス）方向に変化（上昇）する。従って、ＶＤＤ２が一定に制御されるネガティブフィードバックループが構成される。 The control voltage output from the adder AD is provided to the voltage controlled current source P1 through the buffer B. In the voltage control type current source P1, if the output voltage of the adder AD is +, Idummy2 increases, the VDD2 voltage changes (decreases) in the-(minus) direction, and the GND2 voltage changes in the + (plus) direction. (To rise. Therefore, a negative feedback loop in which VDD2 is controlled to be constant is configured.
上記とは異なって第２抵抗（Ｒｃｉｒｃｕｉｔ２）が−ΔＲｃｉｒｃｕｉｔ２だけ変化してＩｃｃ２が減少し、ＶＤＤ２電圧は−ΔＶＤＤ２だけ変化し、ＧＮＤ２電圧は＋ΔＧＮＤ２だけ変化することもできる。 Unlike the above, the second resistance (Rcircuit2) changes by −ΔRcircuit2 to decrease Icc2, the VDD2 voltage changes by −ΔVDD2, and the GND2 voltage changes by + ΔGND2.
このとき第２セルスタックＣＥ２の電圧（Ｖｃｓ２）及び接地電圧（ＧＮＤ２Ｃｅｌｌ）は固定されているので、第１及び第２比較器ＣＡ１，ＣＡ２は−ｅｒｒｏｒを出力する。加算器ＡＤは、オフセット電圧と上記第１及び第２比較器ＣＡ１，ＣＡ２の出力を加算して出力する。 At this time, since the voltage (Vcs2) and the ground voltage (GND2Cell) of the second cell stack CE2 are fixed, the first and second comparators CA1 and CA2 output -error. The adder AD adds the offset voltage and the outputs of the first and second comparators CA1 and CA2 and outputs the result.
上記加算器ＡＤの出力電圧は、バッファーＢを経由して電圧制御型電流源Ｐ１に供給される。上記電圧制御型電流源Ｐ１は、上記加算器ＡＤの出力が−であればＩｄｕｍｍｙ２は減少してＶＤＤ２電圧が＋方向に変化（上昇）し、ＧＮＤ２電圧が−方向に変化（低下）する。従って、ＶＤＤ２が一定に制御されるネガティブフィードバックループが構成される。 The output voltage of the adder AD is supplied to the voltage controlled current source P1 via the buffer B. In the voltage-controlled current source P1, if the output of the adder AD is-, Idmy2 decreases, the VDD2 voltage changes (increases) in the + direction, and the GND2 voltage changes (decreases) in the-direction. Therefore, a negative feedback loop in which VDD2 is controlled to be constant is configured.
上述した本発明の電圧制御型電流源は、Ｉｃｃｎの回路消費電流が０ｍＡから５ｍＡまで変化するとすれば、上記変化範囲がカバーできるものを採用することが望ましい。 As the voltage-controlled current source of the present invention described above, it is desirable to adopt a voltage control type current source that can cover the above change range if the circuit current consumption of Iccn changes from 0 mA to 5 mA.
また、上記動作点を調整するために提供されるオフセット電圧の設定は次の二つの方法に設定できる。 Further, the offset voltage provided for adjusting the operating point can be set in the following two methods.
そのうち一つは、小さいオフセット電圧に設定し、ある程度のΔＶＤＤ２の電圧とΔＧＮＤ２の電圧の変化を許容しながら電流をバランス制御する方法であり、これはＩｄｕｍｍｙが常には流れていないので、消費電流を低く抑制できる。 One of them is a method in which a small offset voltage is set and the current is balanced while allowing a certain amount of change in the voltage of ΔVDD2 and ΔGND2, and this is because Idmy does not always flow. It can be suppressed low.
他の一つは、大きいオフセット電圧に設定し、ΔＶＤＤ２の電圧とΔＧＮＤ２の電圧を一定に維持しながらバランス制御する方法であり、これはＩｄｕｍｍｙが常に流れているので消費電流は増加するが、ＶＤＤ２＝Ｖｃｓ２，ＧＮＤ２＝ＧＮＤ２Ｃｅｌｌの条件が維持できる。 The other is a method in which a large offset voltage is set and balance control is performed while maintaining the voltage of ΔVDD2 and the voltage of ΔGND2 constant. This is because current consumption increases because Idmym is always flowing, but VDD2 = Vcs2, GND2 = GND2Cell.
上述したように、本発明は、バッテリー装置を構成する各ユニットの回路動作電流のバランシングを行うことで、バッテリー装置に備えられる多数の電池セルの満充電を可能とすることは勿論、電池セルの劣化を予め防止し、バッテリー装置を構成する各ユニットごとに回路動作電流にダミー電流を加減することで、各ユニットの回路動作電流が同一になるようにバランシングする。 As described above, according to the present invention, it is possible to fully charge a large number of battery cells provided in the battery device by balancing circuit operating currents of the units constituting the battery device. Deterioration is prevented in advance, and a dummy current is added to or subtracted from the circuit operating current for each unit constituting the battery device, thereby balancing the circuit operating current of each unit to be the same.
以上のように、本発明は、たとえ限定された実施例と図面とによって説明されたが、本発明は上記実施例によって限定されず、これは本発明が属する技術分野において通常の知識を持つ者によりこのような記載より多様な修正及び変形が可能である。 As described above, the present invention has been described with reference to the limited embodiments and drawings. However, the present invention is not limited to the above-described embodiments, and those having ordinary knowledge in the technical field to which the present invention belongs. Therefore, various modifications and variations can be made from the above description.
したがって、本発明思想は以下に記載した特許請求の範囲によって把握されるべきであり、これの均等または等価的変形の全ては本発明思想の範疇に属すると言える。 Therefore, the present invention should be understood by the claims described below, and all equivalent or equivalent modifications thereof belong to the category of the present invention.
Claims (10)
対応するセルスタックの出力電圧と対応するセルスタックに連結された上記制御回路の電圧との間の電圧差を演算し出力する比較部；及び
上記比較部の出力に対応して上記制御回路の回路動作電流にダミー電流を加減する電流源を含むことを特徴とするバッテリー装置の回路動作電流バランシング装置。 In a battery device provided with a large number of cell stacks composed of one or more cells, a circuit operating current of a control circuit, which is a circuit for controlling or monitoring the state of the cell stack connected to each of the many cell stacks A device for balancing
A comparator that calculates and outputs a voltage difference between an output voltage of the corresponding cell stack and a voltage of the control circuit connected to the corresponding cell stack; and a circuit of the control circuit corresponding to the output of the comparator A circuit operating current balancing device for a battery device, comprising a current source for adjusting a dummy current to an operating current.
上記セルスタックの両端の電圧のうち何れか一方の電圧と上記制御回路の両端の電圧のうち何れか一方の電圧とを比較する第１比較部；
上記セルスタックの両端の電圧のうち他方の電圧と上記制御回路の両端の電圧のうち他方の電圧とを比較する第２比較部；及び
上記第１及び第２比較部の出力を加算し上記電流源に提供する加算部を含む請求項１に記載のバッテリー装置の回路動作電流バランシング装置。 The comparison part
A first comparison unit that compares one of the voltages across the cell stack with one of the voltages across the control circuit;
A second comparison unit that compares the other voltage of the voltage across the cell stack with the other voltage of the voltage across the control circuit; and adding the outputs of the first and second comparison units to add the current The circuit operation current balancing device of the battery device according to claim 1, further comprising an adding unit provided to the source.
上記第１比較部の出力と所定オフセット電圧とを加算し、
上記第２比較部の出力と所定オフセット電圧とを加算し、
上記加算結果を再び加算する請求項３に記載のバッテリー装置の回路動作電流バランシング装置。 The adder is
Adding the output of the first comparator and the predetermined offset voltage;
Add the output of the second comparison unit and the predetermined offset voltage,
The circuit operation current balancing device of the battery device according to claim 3, wherein the addition results are added again.
上記第１比較部の出力と上記第２比較部の出力と所定オフセット電圧とを加算する請求項３に記載のバッテリー装置の回路動作電流バランシング装置。 The adder is
The circuit operation current balancing device of the battery device according to claim 3, wherein the output of the first comparison unit, the output of the second comparison unit, and a predetermined offset voltage are added.
対応するセルスタックの出力電圧と対応するセルスタックに連結された上記制御回路の電圧との間の電圧差を演算し出力する段階；及び
上記出力に対応して上記制御回路の回路動作電流にダミー電流を加減する段階を含むことを特徴とするバッテリー装置の回路動作電流バランシング方法。 In a battery device provided with a large number of cell stacks composed of one or more cells, a circuit operating current of a control circuit, which is a circuit for controlling or monitoring the state of the cell stack connected to each of the many cell stacks Is a method of balancing
Calculating and outputting a voltage difference between an output voltage of the corresponding cell stack and a voltage of the control circuit connected to the corresponding cell stack; and a dummy circuit operation current of the control circuit corresponding to the output A circuit operation current balancing method for a battery device, comprising a step of adjusting current.
上記セルスタックの両端の電圧のうち何れか一方の電圧と上記制御回路の両端の電圧のうち何れか一方の電圧とを比較する段階；
上記セルスタックの両端の電圧のうち他方の電圧と上記制御回路の両端の電圧のうち他方の電圧とを比較する段階；及び
上記二つの比較結果を加算して最終比較結果として出力する段階；を含む請求項６に記載のバッテリー装置の回路動作電流バランシング方法。 The output stage is
Comparing one of the voltages at both ends of the cell stack with one of the voltages at both ends of the control circuit;
Comparing the other of the voltages across the cell stack with the other of the voltages across the control circuit; and adding the two comparison results and outputting as a final comparison result; The circuit operation current balancing method of the battery device according to claim 6.
上記比較結果それぞれに所定オフセット電圧を加算した後、再びその加算結果を加算して最終比較結果として出力する請求項８に記載のバッテリー装置の回路動作電流バランシング方法。 The comparison stage is
9. The circuit device operating current balancing method according to claim 8, wherein a predetermined offset voltage is added to each of the comparison results, and then the addition result is added again and output as a final comparison result.
上記二つの比較結果及び所定オフセット電圧を加算して最終比較結果として出力する請求項８に記載のバッテリー装置の回路動作電流バランシング方法。 The comparison stage is
9. The circuit device operating current balancing method according to claim 8, wherein the two comparison results and a predetermined offset voltage are added and output as a final comparison result.
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| PCT/KR2007/003407 WO2008007924A1 (en) | 2006-07-13 | 2007-07-13 | Circuit current balancing method and apparatus for battery apparatus |
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| WO2012043589A1 (en) * | 2010-09-30 | 2012-04-05 | 三洋電機株式会社 | Power supply device |
| KR20180080633A (en) * | 2017-01-04 | 2018-07-12 | 한국전자통신연구원 | Battery module and electronic device including the same |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR100905663B1 (en) | 2009-06-30 |
| US20090315514A1 (en) | 2009-12-24 |
| CN101501955A (en) | 2009-08-05 |
| US8283895B2 (en) | 2012-10-09 |
| WO2008007924A1 (en) | 2008-01-17 |
| EP2050178A1 (en) | 2009-04-22 |
| CN101501955B (en) | 2012-06-27 |
| EP2050178A4 (en) | 2011-08-03 |
| EP2050178B1 (en) | 2017-12-27 |
| KR20080006821A (en) | 2008-01-17 |
| JP4663811B2 (en) | 2011-04-06 |
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